Description
Airy-71
a lightweight 3D printable rubber-band engine model / sailplane
Figure 1: 3D-printed Airy-71 with rubber-band engine
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Parameter |
Airy-71 |
|
Wingspan: |
706 mm |
|
Length: |
499 mm |
|
Wing airfoil: |
S4083 |
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Weight (engine / sailplane): |
80 / 70 g |
|
Wing area: |
6.2 dm2 |
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Wing load (engine / sailplane): |
12.9 / 11.3 g/dm2 |
Available here: https://cults3d.com/en/users/3dprcfun/
https://rc3dmarket.com/3dprcfun
Content
What you get
This is a thoroughly designed 3D printable lightweight rubber-band engine plane. I spent considerable amount of time with prototype testing and refinement to improve printability, flight characteristics, and rigidity. The latter is essential since harder landings are impossible to avoid.
Flexibility was a further design parameter. The Airy-71 can be used as rubber-band engine model and sailplane. Changing between these two modes of operation is possible within seconds.
Most components are designed for printing with Light Weight PLA. The propeller and some other small parts are printed in PLA to withstand stronger forces and to obtain the desired center of gravity position.
3D print files
The package includes a complete set of STL files, a set of PrusaSlicer project files, and the hereof generated gcode. PrusaSlicer is a powerful open-source software that can be used for free. The project files were created with version 2.7.1 and contain all detailed print settings required to optimally print each airplane part.
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STL |
STL stands for Standard Tessellation Language, a file format that describes the surface geometry of a three-dimensional object. High resolution STL files are included for all printable parts. |
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Project files |
Multiple STL files can be combined into a single project file
(3mf) and "print job” (gcode). Specific slicer settings can be applied to e.g.,
increase the stability of a certain part area or improve the printability of an
area with large overhang angle. |
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Gcode |
For the PLA project file and each LW-PLA printable part, gcode files are provided to minimize your preparation time. Please note that these gcode files were generated for the Prusa i3 MK3S. For many 3D printers and filaments, the gcode should just work fine. If you experience issues with the print quality, just modify the slicer parameters in the project file to create the optimal gcode for your printer. |
Figure 2 depicts an exploded view of the Airy-71 and provides an overview of all 3D printable parts. The color code of the index numbers shows to which project file the part belongs.
Figure 2: Exploded view with labeled parts
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Project (.3mf) |
STL name |
Index |
Weight |
Comment |
|
LW-PLA
weight: 66g |
wing-2-l wing-1-l wing-1-r wing-2-r horistab-front horistab-back fuselage-1 fuselage-2 fuselage-3 |
00 01 02 03 04 05 06 07 08 |
8.9 g 10.2 g 10.2 g 8.9 g 1.8 g 1.8 g 14.4 g 6.1 g 3.4 g |
extrusion mult.: 0.45; nozzle temp.: 250°C extrusion mult.: 0.45; nozzle temp.: 250°C extrusion mult.: 0.45; nozzle temp.: 250°C extrusion mult.: 0.45; nozzle temp.: 250°C extrusion mult.: 0.35; nozzle temp.: 250°C extrusion mult.: 0.35; nozzle temp.: 250°C extrusion mult.: 0.45; nozzle temp.: 240°C extrusion mult.: 0.40; nozzle temp.: 250°C extrusion mult.: 0.35; nozzle temp.: 250°C |
|
PLA
time: 3h 52m, weight: 23g |
rod (2x) wing-connector-f. wing-connector-b. rubber-end-holder fuselage-connector propeller locking-ring spinner nose-part1 nose-part2 |
10 11 12 13 14 15 16 17 18 19 |
1.0 g 0.6 g 0.2 g 0.6 g 2.3 g 9.1 g 0.4 g 1.0 g 2.0 g 6.5 g |
connector for sailplane (no drilling) sailplane fuselage nose |
Note: If you want to use a different slicer software, please make sure to check and reapply all part-dependent print settings provided in the PrusaSlicer project files. Otherwise, some parts may not print as desired.
s
Figure 3: All print parts fresh from the printer before post-processing.
What you need
3D printer specification
All STL files have been successfully tested with my Prusa i3 MK3S.
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3D print volume
|
Minimum requirement for single STL file (ensures printability of
all plane parts): X=145mm; Y=145mm; Z=180mm. |
|
Nozzle diameter |
0.4mm |
|
Filament support |
PLA / LW-PLA |
Required materials
Almost all plane parts are printable except for the rubber bands and some metal parts.
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Filament |
Light-Weight PLA: ~70g (e.g., 3DLabPrint PolyLight 1.0) PLA: ~25g (e.g., Overture PLA Professional) |
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Spring steel wires |
Ø 1.5mm, 100mm (to connect propeller with rubber band) |
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Metal washer |
2 small metal washers: inner Ø ≈ 1.5-2mm, outer Ø ≈ 5-6mm, thickness ≈ 0.3-0.8mm |
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Metal spring |
Metal spring from a ballpen |
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Rubber band |
Rubber band for the engine e.g., Flight-Depot Sport Gummi 4.8 X 2000mm Rubber bands to attach the wing to the fuselage. |
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Basic tools |
Cutter knife, file, pliers, drilling machine and drill Ø 1.6mm |
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CA glue |
Medium viscosity e.g., Hobbyking Super Glue CA (50g / 1.7oz) Medium |
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CA accelerator |
Recommended e.g., Hobbyking Insta-Set CA Accelerator 2. Oz |
Assembly
Main video assembly guide
This Airy-7 assembly guide provides all required hints for a successful assembly of the Pilatus B4.
Chapters:
00:00 > Intro
00:26 > Wing
03:45 > Fuselage
07:34 > Glider nose & rubber engine
Pre-flight setting & check
Figure 4: Center of gravity (CoG)
Video
Shop Policies
Delivery Policy
Digital files for own printing will be made available for download (no shipping costs).
Printed parts:
Germany:
- Shipping fee: EUR 7.- including insurance and tracking.
- Expected delivery time: 2-5 days.
European Union (except Germany):
- Shipping fee Option 1: EUR 10.50 no insurance, no tracking. No reimbursement from DHL or the seller in the unlikely event that the goods get damaged or lost during delivery.
- Shipping fee Option 2: EUR 16.50 including insurance and tracking.
- Expected delivery time: 5-10 days.
Please step into contact with me for delivery to other parts of the world.
Contact: 3dprcfun@gmx.net
Refund Policy
30 days return for physical products (printed parts). Buyer pays return shipping.
Offer to Buyer
For our next generation of aerospace engineers :-)
Rating & Reviews
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